Oil-burner.



G. VV. LINDSAY.

on BURNER. APPIJCATION FILED MAY 28| 1915.

Patented Feb. 26, 1918.

2 SHEETS-SHEET l- @mwa/Ufo@ I5. W. LINDSAY.

. OIL BURNER.

APPLICATION FILED MAY 2B. 1915.

2 SHEETS-SHEET 2.

L @mg@ Eatented Feb. 26, 1918.

. Fig. 3.

GEORGIE W. LINDSAY, 0F DENVER, COLORADO.

OIL-BURNER.

To all wzom t may concern:

Be it known that ll, GEORGE W. LINDSAY, a citizen of the Unite-d States, residing at the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Oil-Burners; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, whichv form ay part of this specification.

My invention relates to improvements in oil burners or burners more specially adapted for burning crude oil in furnaces. My object is to provide a burner of this class which shall be economical in construction and exceedingly efiicient in use.

'An important feature of the invention consists of an adjustable member for controlling the supply of air to the burner tip, whereby the oil is atomized and properly mixed with air for combustion purposes.

This adjustable member is hollow and'V spaced from the stationary nozzle or discharge extremity of the burner. Its interior or hollow portion however is a fixed passage for the air, but by virtue of its adjustment on the fuel tube the passage of the air exteriorly around this member and between it and. the stationary member, may be regulated and controlled as desired.

Having briefly outlined my improved construction ll will proceed to describe the same in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof. In this drawing,-

Figure 1 is a side elevation of my improved burner shown in connection with a lower for supplying air under Y pressure thereto, the front wall of the furnace being shown in section.

Fig. 2 is a central vertical section through the burner shown on a much larger scale.

Fig. 3 is a cross section taken on the line 3 3, rig. 2.

lFig. 4 is a side elevation of the burner or a view looking in the direction of arrow 4,

Fig. 5 is a sectional view showing a slihtly modified yform. of construction.

he same referencecharacters indicate the same parts in all the v1ews.

Let the numeral 5 designate my improved Specification of Letters JPatent.

burner considered in its entirety. The con-I struction will first be described more particularly with reference to Figs. 1 to 4 inclusive. The burner consists of a box-like casing 6 which is interiorly threaded at one extremity as shown at 7 to receive a nozzle 8 which has the shape of a frustum of a cone, its larger extremity being connected with the casing. Tn the rear part of the casing 6 is located a web 9 which extends beyond the body of the casing at both top and bottom. Tts latter portion is bored to form a passage 10 for the oil which is t0 be consumed by the burner.

The oil supply pipe 12 is connected with the protruding extremity 13 of the web or tube by a coupling sleeve 14 which is located outside of the body of the casing. The upper part of the web 9 is bored to form a passage 15 in which is inserted a needle valve 16. This valve extends beyond the casing and is threaded to coperate with an interiorly threaded ypart of the web. In order to form a tight joint, a packing gland 18 -is applied to the -valve outside of the casing. The outer extremity of the valve is provided with a hand wheel 19 to facilitate manipulation. v The two passages 10 and 15 formed in the web for the oil and valve as just described, are intersected about midway of the casing by a passage 2() extending forwardly through the web 9 and registering with a passage 21 of a tube 22 whose rear extremity is screwedv into an interiorly threaded nipple 23 which is formed integral with the body of the web 9 and extends forwardly therefrom. The forward portion of the tube 22 is reduced somewhat in size as shown at 24, its outer extremity being flared outwardly as shown at 25 and formed comparatively thin, in order to facilitate the breaking up, atomizing of the oil. This forward end of the tube is located centrally within the outer cylindrical extremity 26 of the nozzle 8 of the casing.

Slidably mounted on the burner tube within the casing, is a sleeve 27 with which is connected by means of stationary arms Patented Feb.. 26, 1919..

Application filed May 28, 1915. Serial No. 30,937.

inner surface of the nozzle 8 are parallel. The member 29 is capable of such adjustment as to completely cutl 0E the passage between it and the nozzle if desired.

The exterior surface of the sleeve 27 is ribbed as shown at 32 to coperate with the teeth of a small gear or pinion 33, which is mounted on a spindle 34 the latter being journaled in'the casing as shown at 35 and 36. One extremity of the spindle extends beyond the casing and is equipped with a relatively large milled head 37 to facilitate adjustment. Between the pinion 33 and the spindle bearing at oney side of the casing ,is located a spiral spring 38 which surrounds the spindle and normally holds it in a predetermined position, whereby a small pin or projection48, which is carried by the head is held in engagement with a toothed zone 39 formed on the outer surface of the casing adjacent the spindle head 37. The spring as just indicated normally holds the pin or projection 48 in a recess or space between two of the teeth of the zone 39, thus locking the spindle against accidental movement.

When it is desired to move the member 29 in either direction, for the purpose of increasing or diminishing the supply of air to the burner, the spindle is rst moved longitudinally in one direction suiiciently to disengage the pin 48 from the teeth of the zone 39, after which the spindle is tur-ned until the member is properly adjusted for the purpose stated.

In the form of construction illustrated in Figs. 1 to 4 inclusive, the pipe or conduit 40 for supplying the burner with air under pressure, is in direct alinement with the axis of the burner or with the passage through the fuel tube. This conduit 40 may be connected with any suitable apparatus for supplying air under the necessary pressure. As shown in the drawing, see Fig. l, this conduit is connected at its extremity remote from the burner casing with a centrifugal blower 41 0f ordinary construction. This blower properly performs the desired function in burners of this class. However, it must be understood that the invention is not limited to any particular apparatus for supplying the necessary air.

While it is preferred to deliver the air through a conduit 40 arranged in alinement with the fuel tube, it is not necessary that this arrangement should be followed since the air may enter the casing 6 at right angles to the axis of the burner as illustrated in Fig. 5. In this case the conduit 42 for 4supplying air to the casing, is connected 6o with the latter at the lower side o r bottom thereof, and consequently the air after entering the casing, must 'make substantially a right angled turn in order that it may pass outwardly around the discharge extremityl of the fuel tube. For this reason it is greatly preferred to supply the air in the manner illustrated in the other Views since the construction shown in such views supplies the required volume of air with less friction than in the form of construction shown in Fig. 5.

In the construction shown in the last named figure, the needle valve 43 is connected with the rear` extremity of the casing, and for this purpose the latter is provided with an exterior nipple 44 which is bored to form a passage 45 for the needle valve. This passage 45 intersects a passage 56 through which a supply of oil passes to the burner from a supply pipe or conduit 57. The nipple 44 is equipped with a packing gland 46 which surrounds the needle valve and in conjunction with a packing 47 forms a fluid tight joint around the valve.

In other respects the form of construction shown in Fig. 5 is substantially the same as that disclosed in the other view.

From the foregoing description the use and operation of my improved burner willI be readily understood. The supply of oil enters the fuel tube 22, either through the passage l0 or the passage 56 according as the one or the other form of construction is employed. By the proper adjustment of the needle valve, the supply of oil to the fuel tube is regulated. Simultaneously with the entrance of the oil to the fuel tube, the air is delivered to the casing and caused to flow through the passages 30 and 31, assuming that the member 29 is adjusted to permit the air to pass between its outer surface and the inner Surface of the burner nozzle 8. The flow of the air through these two passages, whereby it is brought in contact with the oil as it passes from the Aextremity 25 of the fuel tube, produces a partial vacuum or suction at the discharge extremity of the tube, whereby the oil is caused to flow therefrom and is simultaneously atomized and properly mixed with the air for the purpose of combustion. Inr other words the rapid flow of air past the outer extremity of the tube will serve both to cause the oil to flow. freely through the tube and at the same time produce a proper mixture of oil and oxygen for combustion purposes.

I have found in practice that the adjustable member 29 constitutes an exceedingly eilicient device for regulating and controllin the volume of air supply to the burner. It 1s evident that by turning the milled head 37 of the spindle 34, that this member 29 lmay be moved either forwardly for the purpose of diminishing the air supply or rearwardly for the purpose of increasing the same as may be desired.

The outer extremity of the spindle, between the casing and the milled head 37 is equipped with a pointer or indicator 58 whose outer extremity is arranged to move 1,267,8ee el in suitable proximity to a graduated space or arc 49 formed on the casing and which may be provided with numerals or other indicia in order to guide the operator in adjusting the member 29.

Having thus described my invention, what l claim is :w i

l. A burner comprising a easing having an oil passage extending therethrough, means for supplying the oil with air under pressure including a hollow truste-conical member whose axis is coincident with the axis of the oil passage, the burner having a frusta-conical nozzle surrounding the first named frusto-conical member, the latter being adjustable to regulate the passage between it and the nozzle, and spring actuated .locking means for retaining the truste-conical member in any adjusted position against accidental displacement.

2. A burner comprising a casing having an oil passage extending therethrough, means for supplying the oil with air under pressure including a hollow frusto-conical member whose axisv is coincident with the axis of the oil passage, the burner having a frusto-conical nozzle surrounding the first named frusto-conical member, the latter being adjustable to regulate the passage between it and the nozzle, and means eX- teriorly of said casing for indicating the relative position of the movable parts for any adjustment.

ln testimony whereof I aiiix my signature in presence of two witnesses.

GEORGE LINDSAY.

A. J. OBRIEN. 

